No one steals third anymore anyway. Lefty's would have a huge advantage on pickoffs to first. When a righty catcher trys to pick someone off, he has to jump up, rotate his body giving the runner more time and recognition. Where as a lefty can just make the throw, their shoulders are already there.
But leftys/rightys have the same amount of difficulty in terms of throwing to second. There is no disadvantage there.
Is pushing for President Obama to pass a law requiring all citizens to be Chicago White Sox fans and make October 1st "White Sox Day" where we all dress as our favorite player. It maybe socialist, but I don't care.